Improvement in sewing-machines



`A. MOLT'Z.-

Sewing-Machines.

- UNITED STATES PATENT OFFICE..

ADAM MoLrz, oE NEW Yonn, N. Y.

IMPROVEMENT IN SEWING-MACHINES.

Specification forming part of Letters Patent No. 146,466, dated January13, 18745 application filed December 16, 1873.

To all whom it may concern:

Be it known that I, ADAM MoLrz, of New York, in the county of New Yorkand State of `New York, have invented certain new and usefulImprovements in Sewing-Machines; and I do hereby declare that thefollowing is a full, clear, and exact description thereof, referencebeing had to the` accompanying drawings, and

to the letters of reference marked thereon, which form a part of thisspecication.

My present invention is intended as an improvem ent upon the LettersPatent Nos. 108,070

` and 118,631, granted to me, respectively, May

17,1870, and August 29,1871; and the nature of my invention consists inthe construction of longitudinal vertical section taken through the linew w, Fig. 1. Fig. 5 is a side View of the shuttle, and Fig. 6 is alongitudinal section of the same.

A represents the bed-plate of the machine, with bearings B B on itsunder side for sustaining the rocker-shaft C, from which motion iscommunicated both to the shuttle-carrier and the feeding mechanism. Drepresents the shutt1ecarriage, which is pivoted at its lower end to thebearing B, almost directly below the rockershaft C, and is then curvedto pass around the same, and its upper end formed to receive theshuttle. The shuttle rests upon a iiange, a, and its heel or rear end isheld by an ear, b, while the point of the shuttle projects through aV-shaped notch in an ear, d, at the front end of the shuttle-bed. Theshuttleearrier is actuated from the rocker-shaft C by an arm, E, in thesame manner as described in the Patent No. 118,631, above referred to.The shuttle Gr is substantially of the form shown in Figs. 5 and 6, andprovided with a pin, f, in the center of the bottom, upon which thebobbin revolves, the bobbin being held in check by a spring, e, pressingupon it. This spring is located immediately in rear of the pinf in thecenter of `the back, and held in place by a pivot, upon which it may beturned in removing andinserting the bobbinf` his a spring formed. like ahook and located immediately in front of the pin f, and employed to givetension to the thread. On the end of the rocker-shaft C is secured acam, H, which operates a vertical slide, I, moving .up and down insuitable guides on the outer side of the bearing B. The slide I is, nearits upper end, on the outer side, provided with a flange or elongatedprojection, which passes through a horizontal slot in the feed-bar J,and hence said feed-bar is moved up and down by the rocking orbackward-and-forward movement of the cam H.

The feed-bar J is moved backward and forward by the following means: Onthe hub of the cam H is a bevel-headed pin or screw, m, which operatesagainst the lower end of apivoted lever, K, to turn the same on itspivot, when the feed-bar has been raised by the cam H. The upper end ofthe leverK is forked or slotted, and lits over a pin, n, in the feed-barJ, so that said feed-bar will, by the movement of the lever K, be movedforward to feed the goods. As soon as the feed-bar is moved downward andthe pin m clears the lower end of the lever K, a spring, p, attached tothe upper end of said lever, throws the feed-bar back again in itsformer position, thus forming the usual four-motin feed. The extent ofthe forwardand-backward movement of the feed-bar is .regulated by meansof a lever, L, the upper end of which is slotted or provided with aslotted plate, t, which is placed over a pin, s, in the feed-bar. y Bysetting this lever backward or forward, the length of the stitch isregulated, as the feed-bar can only move back till the pin s strikes theend of the slot in the plate t.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is-

1. The cam H, vertical slide I, with projec- A tion 17, in combinationwith the slotted feed-bar J, pins m and n, spring p, and lever K, alloon- In testimony that I claim the foregoing as struoted and arrangedfor operation as and for my own I afx my signature in presence of twothe pulpolse speoefl 1 tte l 1 t t a d .n Witnesses.

2.leever W1 soy( ae n 1 s, n combination7 with cam H,ps1ide I havpngADAM MOLTZ projection i, slotted feed-bar J, pins m and fn, Wvitnossos:lever K, and spring p, substantially' as and for R. WETZLICH, thepurpose herein set forth. A. KRATZ.

